QUOTATION: Practical Atheism and the Sense of Sin

The loss of the sense of sin is thus a form or consequence of the denial of God: not only in the form of atheism but also in the form of secularism. If sin is the breaking off of one's filial relationship to God in order to situate one's life outside of obedience to him, then to sin is not merely to deny God. To sin is also to live as if he did not exist, to eliminate him from one's daily life.

--Pope John Paul II, Reconciliatio et Paenitentia